Q: A scientist is measuring the diameter of a virus and records it as 120 nm. What is this value in meters?

$$1.2 \times 10$$^{-7}$$ meters

Question 1

Which of the following statements best describes the field of microbiology?

Accepted Answer

The study of living things that are too small to be seen with the unaided eye.

Question 2

Which of the following groups is NOT considered a primary focus in microbiology?

Accepted Answer

Plants

Question 3

Which of the following is a correct comparison between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack a nucleus, while eukaryotic cells have a nucleus.

Question 4

Which of the following is an example of a positive use of microbes in society?

Accepted Answer

Production of antibiotics

Question 5

A scientist observes a microorganism that is unicellular, lacks a nucleus, and is found in extreme environments. Which group does this organism most likely belong to?

Accepted Answer

Archaea

Question 6

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are acellular and require a host cell to reproduce.

Question 7

A bacterial colony is visible to the naked eye because:

Accepted Answer

It consists of millions of individual bacteria grouped together.

Question 8

Convert 0.0000456 to scientific notation.

Accepted Answer

$$4.56 	imes 10$$^{-5}$$

Question 9

Which metric unit would be most appropriate to measure the diameter of a typical bacterium?

Accepted Answer

Micrometer ($$\mu m)$$

Question 10

If you multiply $$2.0 	imes 10$$^{3}$$ by 3.0$$ 	imes $$10^{4}$$, what is the result in scientific notation?

Accepted Answer

$$6.0 	imes 10$$^{7}$$

Question 11

Which historical experiment most directly disproved the theory of spontaneous generation?

Accepted Answer

Louis Pasteur's swan-neck flask experiment

Question 12

Which of the following best describes the theory of biogenesis?

Accepted Answer

Living things arise only from other living things.

Question 13

Which of the following is a correct statement about the metric system as used in microbiology?

Accepted Answer

A nanometer ($$nm) is$$ $$10^{-9}$$ meters.

Question 14

Which of the following scientists was the first to observe and describe bacteria?

Accepted Answer

Antonie van Leeuwenhoek

Question 15

Which of the following is a unique feature of viruses compared to bacteria, fungi, and protozoa?

Accepted Answer

Viruses are acellular and cannot reproduce without a host cell.

Question 16

Which of the following is a contribution of a 'hidden figure' in microbiology?

Accepted Answer

Fannie Hesse suggested the use of agar in culture plates.

Question 17

A scientist is measuring the diameter of a virus and records it as 120 nm. What is this value in meters?

Accepted Answer

$$1.2 	imes 10$$^{-7}$$ meters

Question 18

Which of the following best explains why most microbes are not harmful to humans?

Accepted Answer

Only about 1% of microbes cause disease; most are harmless or beneficial.

Question 19

Which of the following is a correct application of scientific notation rules: $$10^{6}$$ \div $$10^{2}$$ equals?

Accepted Answer

$$10^{4}$$

Question 20

Which of the following is a real-world example of microbes contributing to environmental sustainability?

Accepted Answer

Microbes breaking down oil spills in water.

Main Themes and Foundations of Microbiology

Guida di studio - Domande di pratica

Study guide - Flashcard